hi! has anyone used a graupner prop? how do they perform compared to a APC or master airscrew?
thanks!

They absorb quite a bit more power at the same rpm. About 20% more to be specific. The weight is high, so not very well suited for 3D.
If you are an rpm-O-phile , you will not love them.
Having said that: They perform very well, and are worth a try.

They also do no break only looking at them. They can take the abuse of hard landings with tip strike. Not good for the engine though.

pe, what d you mean they absorb a bit more power? i'll be using this in a homelite 25cc. i'm planning on 3 blades, graupner has 16x8 3 blade and MAS has a 16x10 3 blade. which do you think will perform better? or am i better off with an APC 16x8?

Hi!
There are two types of Graupner props , gray ones (old style with blunt tips) and the new black (some are gray) Cam-prop model with up-swept tips.
These later ones are much better than the old blunt-tip Graupner props.
As for Graupner being better than master Airscrew props?....MA props are the worst there is so everything is better than MA black props.
3-blade props are always worse than 2-bladed ones ...that's a fact! so why use them??
Regards!
Jan K
Sweden

well i guess i'll go with a 2 blade APC. 16x8 maybe. or can a 25cc homie handle 17x6? and which will be better?